private void ZoomInAndZoomOut_Load(object sender, EventArgs e)
        {
            winformsMap1.MapUnit = GeographyUnit.DecimalDegree;
            winformsMap1.BackgroundOverlay.BackgroundBrush = new GeoSolidBrush(GeoColor.GeographicColors.ShallowOcean);
            winformsMap1.CurrentExtent = new RectangleShape(-139.2, 92.4, 120.9, -93.2);

            WorldMapKitWmsDesktopOverlay worldMapKitDesktopOverlay = new WorldMapKitWmsDesktopOverlay();
            winformsMap1.Overlays.Add("WorldMapKitWmsOverlay", worldMapKitDesktopOverlay);

            winformsMap1.ZoomLevelSet.CustomZoomLevels.Add(new ZoomLevel(800000));
            winformsMap1.ZoomLevelSet.CustomZoomLevels.Add(new ZoomLevel(300000));
            winformsMap1.ZoomLevelSet.CustomZoomLevels.Add(new ZoomLevel(90000));
            winformsMap1.ZoomLevelSet.CustomZoomLevels.Add(new ZoomLevel(70000));
            winformsMap1.ZoomLevelSet.CustomZoomLevels.Add(new ZoomLevel(50000));
            winformsMap1.ZoomLevelSet.CustomZoomLevels.Add(new ZoomLevel(40000));
            winformsMap1.ZoomLevelSet.CustomZoomLevels.Add(new ZoomLevel(25000));
            winformsMap1.ZoomLevelSet.CustomZoomLevels.Add(new ZoomLevel(15000));
            winformsMap1.ZoomLevelSet.CustomZoomLevels.Add(new ZoomLevel(7500));

            winformsMap1.Refresh();
        }

        private void btnZoomIn_Click(object sender, EventArgs e)
        {
            winformsMap1.CurrentScale = 800000;
            winformsMap1.Refresh();
        }